Let’s solve each problem one by one. Remember — these are “April Fool’s” problems, so something is wrong with each one! We need to find the mistake, fix it, and then solve the corrected version.
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Problem 1:
> A car is travelling at 120 miles per hour. How long will it take to travel 160km?
🔍
What’s wrong?
The speed is in
miles per hour, but the distance is in
kilometers. You can’t mix units like that! You must convert either miles to km or km to miles before solving.
✔ Corrected Problem:
Let’s convert 120 miles per hour to kilometers per hour.
We know:
1 mile ≈ 1.60934 km
So, 120 miles/hour = 120 × 1.60934 ≈
193.12 km/h
Now the problem becomes:
> A car is travelling at 193.12 km per hour. How long will it take to travel 160 km?
⏱️
Solve:
Time = Distance ÷ Speed
Time = 160 km ÷ 193.12 km/h ≈
0.828 hours
To make it easier to understand, let’s convert to minutes:
0.828 × 60 ≈
49.7 minutes → about
50 minutes
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Problem 2:
> John has a 5 kg bag of rocks and a 5kg bag of paper. He picks up the heaviest bag and puts it in his car first. He puts the lightest bag in last. Which bag did he pick up first?
🔍
What’s wrong?
Both bags weigh
exactly 5 kg! So neither is heavier or lighter. The question tricks you into thinking one is heavier — but they’re equal!
✔ Corrected Problem:
Let’s change it slightly to make sense:
> John has a 5 kg bag of rocks and a 3 kg bag of paper. He picks up the heaviest bag and puts it in his car first. He puts the lightest bag in last. Which bag did he pick up first?
⚖️
Solve:
Heaviest = 5 kg (rocks) → picked up first
Lightest = 3 kg (paper) → put in last
Answer: He picked up the
bag of rocks first.
*(Note: If we keep both as 5 kg, the answer would be “neither — they weigh the same,” but since the original says “heaviest” and “lightest,” we assume a typo and correct it for logic.)*
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Problem 3:
> There are 126 children in a school. One quarter of them are girls. How many are boys?
🔍
What’s wrong?
One quarter means 1/4. But 126 divided by 4 is
not a whole number:
126 ÷ 4 = 31.5 → You can’t have half a child!
✔ Corrected Problem:
Let’s adjust the total number of children to make it divisible by 4. Closest easy number:
124 or
128. Let’s use
128 (since 128 ÷ 4 = 32 exactly).
New problem:
> There are 128 children in a school. One quarter of them are girls. How many are boys?
👧👦
Solve:
Girls = 1/4 of 128 = 128 ÷ 4 =
32 girls
Boys = Total - Girls = 128 - 32 =
96 boys
*(Alternatively, if we kept 126, we’d say 31.5 girls — which is impossible — so correcting the total makes sense.)*
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Final Answer:
1. Mistake: Mixed units (miles and km). Corrected: Car travels at ~193.12 km/h. Time to go 160 km ≈
0.83 hours (or about 50 minutes).
2. Mistake: Both bags weigh 5 kg — no heaviest/lightest. Corrected: Assume rock bag is 5 kg, paper is 3 kg. He picked up the
rock bag first.
3. Mistake: 126 ÷ 4 = 31.5 — not possible for people. Corrected: Use 128 children. Girls = 32, Boys =
96.
Parent Tip: Review the logic above to help your child master the concept of april fools day worksheet printables.
